This clever defensive lockdown relies on Delaying Shield to entirely intercept any incoming damage you would otherwise take, turning a lethal blow into a harmless stream of counters. Normally, those counters would come due during your upkeep as a painful life tax, but Solemnity steps in to completely shut down that mechanic by preventing counters from ever being placed on enchantments in the first place. Without any delay counters to remove, Delaying Shield's upkeep trigger has nothing to count, leaving you totally immune to damage at zero ongoing cost.